Extraction equilibria of copper and zinc with alkylphosphonic acid monoester.
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概要
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Measurements of the extraction equilibria of copper and zinc with 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester dissolved in w-heptane or toluene diluent were carried out at 303 K. It was found that the extractant (HR) is apt to dimerize in n-heptane diluent. It was clarified that copper and zinc are extracted according to the following equations, respectively, in the low concentration range of the metals. Cu2+aq+2(HR)2, org⇔CuR2•2HRorg+2H+aq Zn2+aq+1.5(HR)2, org⇔ZnR2•HRorg+2H+aqExtraction equilibrium constants, Ke, Cu = 1.0×10-4 and Ke, Zn=2.5×10-2 mol1/2/dm3/2 were obtained. From the above experimental results, it is seen that selective separation of copper and zinc is possible by solvent extraction with the extractant used in this study.
- 公益社団法人 化学工学会の論文
著者
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Nakashio Fumiyuki
Department Of Applied Chemistry Kyushu University
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Kondo Kazuo
Department Of Applied Chemistry Okayama University
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MURAKAMI AKINORI
Department of Organic Synthesis, Kyushu University
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AKIYOSHI YOSHIRO
Department of Organic Synthesis, Kyushu University
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